Furnace.



P. O. PARSONS.

FURNACE.

APPLIUATION 311421) JUNE 24,1913.

Patented Mar. 23, 1915.

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FURNACE.

APPLIGATION FILED JUNE24,1913' v 1 1 3&1 v Patented Mar. 23, 19 15.

' 2 SHEETSSHEET 2.

I z I O I I I I I l l I I II II L I I I \I 3 I J I I I II I "I I I I I F I I I I l I I l I g I I I I l I V I I I I Ml] O I I I I I I I l f I LI I I I I I I I I g l I I I 1 I II I I I I I I I I I fizz/ea er FRANK C. PARSONS, OF EAST CLEVELAND, OI-IIO, ASSIGNOR TO THE STRONG, CARLISLE AND HAMMOND COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

summon.

Specification of Letters Patent. Patented Elan, 23,1915,

Application filed June 24, 1913. Serial No. 775,492.

To all whom it may concern Be it known that I, FRANK O. PARsoivsf a citizen of the United States, and a resident of East Cleveland, county of Cuyahoga, and State of Ohio, have invented a new and useful Improvement in Furnaces, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

The subject of the present invention is a case hardening or annealing furnace of the underfired type which has been designed to permit of an eflicient and convenient operation. Extremely good results are also obtained by reason of the. perfect sealing or closure of the combustion'or heating chamber.

It has heretofore been impossible to design an annealing furnace in which the holders for the material were entirely removable from the furnace by reason of the lack of any suitable means for sealing the space between such holders and the sides of the furnace when the holders were in position.

In the present invention I have provided a removabletruck or work holder which may be sealed against the sides of the furnace when the holders were in position.

In the present invention I have provided a removable truck or work holder which may be sealed against the sides of the furnace when in position, thus preventing the escape of any of the hot gases or the inlet of any excess air from the outside.

To the accomplishment of these and related ends said invention then consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawings and the following description set forth in detail certain mech- -anism embodying the invention, such dismay be placed in the furnace walls 7 as in Fig. 1, or in the main floor 8 of the trucks as shown in 3. If placed in the position shown in' Fig. 1 the burners will be suitably connected by means of pipes-9 and 10 with an air and gas supply. If mounted on the truck the connections will be similar, consisting of pipes 11 and 12, but it will be necessary to provide a flexible connection between the main supply pipe and a pipe which is mounted in the rear of thefurnace wall. This connection must therefore be broken upon each removal of the truck from the furnace.

The truck is provided with a main floor 8 composedof suitable refractory material such as'fire-brick, and above the main floor there willbe mounted a second or supplementary floor 15, thus forming a combustion chamber between the main and secondary floors. "The burners 6 in the walls of the furnace will be disposed at such a level that they will discharge directly into the space between the two floors. The floors are so spaced that a combustion chamber is formed between them. The'mateiial which is being treated will, of course, be carried-upon the second floor and thus it will be'heated from all sides. The furnace chamber thus formed will'be heated on all sides by the burning gas, particularly on the sides and floor and the materials will be heated by heat radiated from these parts.

In this way all directheating of the materlal is eliminated,,that is, the gas flame is heating eificiency'of the furnace.

Upon the sides of the truck and at the 1 same level upon the-;-sides of the furnace there are mountedinclined or beveled plates 16 and-17 which are adapted to be contacted throughout their length by pivotally mounted bars 18, such bars being supported upon the furnace chamber. It will be obvious that I rods 19 pivotally attached to the bottom of I bars of 'various shapes may 'be'used as square bars are not the only kind Which Will serve the purpose." These bars.l8 are hollow and are connected at either end With a flexibletube 20 which Will be attached tosome suitable source of Water supply. for the purpose of keeping the tubes cool and preventing their-becomingso heated that they will Warpor scale, in Which event theclosure Would be imperfect. In this Way the space above the .main. floor of the truck is completely sealed from-the. bottom of the furnace and also from; the. outside air, The bars 18; arebrought into position and maintained thereinby. WeightsQzS connected by. chains 26 extendingbver sheaves 27.

Theltruckr 's constructed and adapted to be moved close to endwalhofthe furnace thus practically. closing the; space above the truck at thispoint, andthe door is; adapted When closed tobe acent to the other end of the truck. It -vvill thus be seenthat the sides of the truck past which gas travels are; closed andsealed against'the. furnace Walls and the combustion and heating effect in, the furnace chamber-Will thus depend absolutely upon the mixture. and the supply of the gas or oil which is ,delivered through the burners.

Regulation may, thus be effected 'WithOUt fear of disturbance by outside conditions and much better results secured.

It is. considered, unnecessary to A describe the operationof; the furnace; as it. Will be evidsnt: from the foregoing. description. The .material ;Wlll firstasbe. placed upon the truckand the-latter moved into position. and them-.se aled as already, described. .A very muchincreased efiiciency is secured j in the plyesel'lt-gfurnaceanda much better treatment of {the -.materia1S.-:

Othenmodes of apply'ng the principle of myz invention may be employed instead i of the one-explained, change being made as itgards the mechanism herein disclosed, providedthe means stated by any of the-following claims on the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention 2-. Y

1. Sealing means for furnace chambers adapted; to. receive a movable car bearing material to be heated comprising pivotally mounted bars, and complementary members on ,the sides of said furnace and on such cars adaptedto snug-1y contact the sides of said barswhenthe same aresvvung, thereby sealingsaidfurnace at the level tofsaid bars.

2; Sealing; means for furnace chambers adapted, to receive ajmovable. car bearing material to be heated, comprising: pivotally mounted hollow bars, complementary'members on the;sidesiof:saidcfurnace. andon such car. adapted. to snugly. contact, the. sides and flexible means connected to the ends of;-

said barsgand adapted to supplyrcooling 3111a terial thereto.

Signedby'me, this 2() day OfiTJIlIlQ 1913.

FRAiNK; 6,; RA-RSQNSn Attested by Ba D.- Kinnen,;, 

